One of the main goals of network segmentation is to limit the damage caused by a company's network attacks, especially the damage caused by internal threats. Without strong network segmentation, any threat beyond perimeter defense can affect the entire network.

Best practice n. 1 on network segmentation: Carry out regular network checks
It is not possible to adequately isolate and protect the unknown. Regular network reviews are essential for an in-depth defense strategy. Otherwise, there is a risk that some endpoints and network connections will be lost and security breaches occur that an attacker could exploit.

Performing frequent network scans to identify new resources added to the network is one of the most effective network security methods to fix security gaps in the organization. Therefore, carry them out regularly.

Best practice # 2 for network segmentation: Consolidate similar resources in one database
When preparing to implement a network segmentation strategy, it can be helpful not only to review all of the data on the network, but to consolidate similar data and resources into individual databases. This simplifies setting up a policy with the lowest privileges and makes it easier to protect additional confidential information.

Suppose we have information about customers that only a few people in your company have access to. Instead of having this data on dozens of workstations, it is better to consolidate it into a single, well-protected database to increase security.

This requires fewer resources than trying to protect dozens of endpoints, and enables more stringent security measures without affecting overall network performance or the user experience.

By defining which resources are "similar" for consolidation purposes, you can sort the data by type and level of sensitivity.

Best Practice No. 3 for network segmentation: Creation and isolation of access portals for certain providers
Most organizations work with different suppliers to meet their different needs. From providers of HVAC repairs to suppliers of supply chains to providers of specific software licenses, the list of specialists that a company could hire for services is endless. Although not all providers need to log in to their company's backend, some may need to log in to their systems to provide services.

When creating access portals for external suppliers in your network, it is important to block them as much as possible and only grant access to the resources you need to play your part in your company. This helps to limit the possible impact of a security breach on the supplier organization.

For example, if the provider is hacked and you have full access to their systems, the attacker could also hack your network. However, if the provider's access is limited to a few systems that are isolated from the rest of the network, the harm is likely not to be serious. Check here for managed firewall services